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1.
Lagerstroemia (crape myrtle) are famous ornamental plants with large pyramidal racemes, long flower duration and diverse colours. Genetic maps provide an important genomic resource of basic and applied significance. A genetic linkage map was developed by genotyping 192 F1 progeny from a cross between L. caudata (female) and L. indica (‘Xiang Xue Yun’) (male) with a combination of amplification fragment length polymorphisms (AFLP) and simple sequence repeats (SSR) markers in a double pseudo‐testcross mapping strategy. A total of 330 polymorphic loci consisting of 284 AFLPs and 46 SSRs showing Mendelian segregation were generated from 383 AFLP primer combinations and 150 SSR primers. The data were analysed using JoinMap 4.0 (evaluation version) to construct the linkage map. The map consisted of 20 linkage groups of 173 loci (160 AFLPs and 13 SSRs) covering 1162.1 cM with a mean distance of 10.69 cM between adjacent markers. The 20 linkage groups contained 2–49 loci and ranged in length from 7.38 to 163.57 cM. This map will serve as a framework for mapping QTLs and provide reference information for future molecular breeding work. 相似文献
2.
Two genetic linkage maps of Zea mays were constructed: one population comprised 94 F2 individuals of a dent ‘B64’ × teosinte (Z. mays ssp. huehuetenangensis) cross while the second consisted of 94 F2 individuals of a ‘B64’ × Caribbean flint ‘Na4’ cross. The level of polymorphism was higher in the ‘B64’ × teosinte combination than the ‘B64’ × ‘Na4’ combination. In the ‘B64’ × teosinte cross, a total of 338 amplified fragment length polymorphism (AFLP) and 75 simple sequence repeat (SSR) markers were mapped to 10 chromosomes, which covered 1402.4 cM. In the ‘B64’ × ‘Na4’ cross, a total of 340 AFLP and 97 SSR markers were mapped to 10 chromosomes, covering 1662.8 cM. Segregation distortion regions were found on chromosomes 4, 5 and 8 in the ‘B64’ × teosinte cross and on chromosome 9 in the ‘B64’ × ‘Na4’ cross. Comparison of the two maps revealed that the maize × teosinte map was 11.5% shorter than the maize × maize map. The maps generated in this study may be useful to identify genes controlling flooding tolerance. 相似文献
3.
Cashew (Anacardium occidentale) is a widespread tropical tree crop that is grown primarily for its nuts and has a global production of over 2 million Mt.
In spite of its economic importance to many countries, however, no linkage map containing STS anchor sites has yet been produced
for this species. This is largely attributable to a prolonged juvenile phase of the tree (limiting mapping to F1 progenies) and difficulty in effecting sufficient hand-pollinations to create mapping populations of effective size. Here,
we produce an F1 mapping population of 85 individuals from a cross between CP 1001 (dwarf commercial clone) and CP 96 (giant genotype), and
use it to generate two linkage genetic maps comprising of 205 genetic markers (194 AFLP and 11 SSR markers). The female map
(CP 1001) contains 122 markers over 19 linkage groups and the male map (CP 96) comprises 120 markers assembled over 23 linkage
groups. The total map distance of the female map is 1050.7 cM representing around 68% genome coverage, whereas the male map
spans 944.7 cM (64% coverage). The average map distance between markers is 8.6 cM in the female map and 7.9 cM in the male
map. Homology between the two maps was established between 13 linkage groups of the female map and 14 of the male map using
46 bridging markers that include 11 SSR markers. These maps represent a platform from which to identify loci controlling economically
important traits in this crop. 相似文献
4.
A restriction fragment length polymorphism (RFLP) based linkage map of a cross between two diploid Hordeum bulbosum (2n = 2x = 14) clones, PB1 and PB11, was constructed from 46 recombinant progeny clones. Since both parents are heterozygous,
separate and combined parental maps were constructed. All of the RFLP markers screened had previously been mapped in barley
(H. vulgare L.) so that comparative maps could be produced. The PB1 linkage map consists of 20 RFLP marker loci assigned to four linkage
groups covering 94.3 cM. The PB11 linkage map consists of 27 RFLP marker loci assigned to six linkage groups covering 149.1
cM. Thirteen markers polymorphic in both parents were used as ‘anchors’ to create a combined linkage map consisting of 38
loci assigned to six linkage groups and covering a genetic distance of 198 cM. Marker order was highly conserved in a comparison
with the linkage map of H. vulgare (Laurie etal., 1995). However, in contrast, the genetic distances for the same markers were very different being 649 cM and
198 cM respectively, a genetic distance ratio of 1: 3.3. Thus although the map was short, it can be presumed to cover half
the genome of H. bulbosum. This study provides further confirmation of the close relationship between the two species and gives a basis for the development
of marker mediated introgression through interspecific hybridisation between the two species.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
5.
Summary The first genetic linkage map of Japanese bunching onion (Allium fistulosum) based primarily on AFLP markers was constructed using reciprocally backcrossed progenies. They were 120 plants each of (P1)BC1 and (P2)BC1 populations derived from a cross between single plants of two inbred lines: D1s-15s-22 (P1) and J1s-14s-20 (P2). Based on the (P2)BC1 population, a linkage map of P1 was constructed. It comprises 164 markers – 149 amplified fragment length polymorphisms (AFLPs), 2 cleaved amplified polymorphic
sequences (CAPSs), and 12 simple sequence repeats (SSRs) from Japanese bunching onion, and 1 SSR from bulb onion (A. cepa) – on 15 linkage groups covering 947 centiMorgans (cM). The linkage map of P2 was constructed with the (P1)BC1 population and composed of 120 loci – 105 AFLPs, 1 CAPS, and 13 SSRs developed from Japanese bunching onion and 1 SSR from
bulb onion – on 14 linkage groups covering 775 cM. Both maps were not saturated but were considered to cover the majority
of the genome. Nine linkage groups in P2 map were connected with their counterparts in P1 map using co-dominant anchor markers, 13 SSRs and 1 CAPS. 相似文献
6.
The linkage relationships between 164 polymorphic amplified fragment length polymorphism (AFLP) and 25 restriction fragment length polymorphism (RFLP) fragments assayed in a pseudo‐testcross population generated from the mating of single genotypes from two divergent cultivars were used to construct female, ‘Katambora’ (‘Kat’) and male, ‘Tochirakukei’ (‘Toch’) parental genetic maps for rhodesgrass. The ‘Kat’ genetic map consists of 84 marker loci (72 AFLP and 12 RFLP markers) distributed on 14 linkage groups and spans a total length of 488.3 cM, with an average distance of 7.8 cM between adjacent markers. The ‘Toch’ genetic map consists of 61 marker loci (52 AFLP and nine RFLP) mapped on 12 linkage groups spanning a total length of 443.3 cM, with an average spacing of 9.0 cM between adjacent markers. About 23% of the markers remained unassigned. The level of segregation distortion observed in this cross was 11.1%. In both maps, linked duplicated RFLP loci were found. These linkage maps will serve as a starting point for linkage studies in rhodesgrass with potential application for marker‐assisted selection in breeding programmes. 相似文献
7.
苦荞SSR分子遗传图谱的构建及分析 总被引：4，自引：1，他引：3
构建苦荞遗传连锁图谱,为今后有关苦荞基因组结构、重要农艺性状QTL定位、分子标记辅助育种和基因克隆等研究工作奠定基础。以栽培苦荞‘滇宁一号’和苦荞野生近缘种杂交产生的119份F4代分离材料为作图群体,利用SSR分子标记来构建苦荞的分子遗传连锁图谱。本研究构建的连锁图谱包含15个连锁群,由89个标记组成,其中偏分离的标记有22个,占24.7%,每条连锁群上的标记在2~16之间。连锁群长度在6.9~165.8 cM的范围,覆盖基因组860.2 cM,总平均长度9.7 cM。本研究构建了首张苦荞SSR遗传连锁图谱,为苦荞QTL定位、基因克隆、遗传选育等研究奠定了基础。 相似文献
8.
Chunming Bai Chunyu Wang Ping Wang Zhenxing Zhu Ling Cong Dan Li Yifei Liu Wenjing Zheng Xiaochun Lu 《Euphytica》2017,213(12):285
Sorghum is one of the most important cereal crops; it is used to produce feed, sugar, and biofuel. To investigate genetic tradeoffs between grain and stem sugar production, we evaluated plant height, Brix (the percentage of soluble solids in stalk juice), 100-grain weight and flowering time over 3 years in a recombinant inbred line (RIL) population consisting of 189 individuals derived from a cross between the sweet sorghum cultivar ‘Rio’ and grain sorghum ‘BTx623’. We constructed a genetic linkage map (total length, 1418.71 cM; average distance between markers, 11.26 cM), which consisted of 118 simple sequence repeat (SSR) and 8 insertion-deletion (INDEL) markers. A total of 14 QTLs were detected on chromosomes 1, 3, 6, 7, and 9, which included 6 QTLs for plant height; 4 for Brix; and 2 QTLs for each 100-grain weight and flowering time. Eight QTLs were detected at least in 2 years. These results will be useful for future QTL fine mapping and gene mining for these traits, and useful for the improvement of sorghum through molecular marker-assisted selection. 相似文献
9.
亚麻遗传连锁图谱的构建 总被引：2，自引：0，他引：2
利用DIANE (纤用亚麻栽培种)和宁亚17 (油用亚麻栽培种)为杂交亲本,构建30个F2单株作为作图群体,选用71对SRAP和24对SSR共显性标记构建了全长为546.5 cM,含12个连锁群(LGs)的亚麻遗传连锁图谱,标记均匀分布于12个连锁群,每个连锁群有4~15个标记,标记间平均距离为5.75 cM。结果表明,SRAP标记和SSR标记中共显性标记适合于亚麻遗传连锁图谱的构建,但该图谱覆盖的基因组范围较小,需继续图谱的完整性工作。本研究为今后的亚麻在分子生物学方面的研究提供了基础信息。 相似文献
10.
Construction of a genetic linkage map and QTL analysis of fiber-related traits in upland cotton (Gossypium hirsutum L.) 总被引：1，自引：0，他引：1
Zheng-Sheng Zhang Yue-Hua Xiao Ming Luo Xian-Bi Li Xiao-Ying Luo Lei Hou De-Mou Li Yan Pei 《Euphytica》2005,144(1-2):91-99
A genetic linkage map with 70 loci (55 SSR, 12 AFLP and 3 morphological loci) was constructed using 117 F2 plants obtained from a cross between two upland cotton cultivars Yumian 1 and T586, which have relatively high levels of
DNA marker polymorphism and differ remarkably in fiber-related traits. The linkage map comprised of 20 linkage groups, covering
525 cM with an average distance of 7.5 cM between two markers, or approximately 11.8% of the recombination length of the cotton
genome. The present genetic linkage map was used to identify and map the quantitative trait loci (QTLs) affecting lint percentage
and fiber quality traits in 117 F2:3 family lines. Sixteen QTLs for lint percentage and fiber quality traits were identified in six linkage groups by multiple
interval mapping: four QTLs for lint percentage, two QTLs for fiber 2.5% span length, three QTLs for fiber length uniformity,
three QTLs for fiber strength, two QTLs for fiber elongation and two QTLs for micronaire reading. The QTL controlling fiber-related
traits were mainly additive, and meanwhile including dominant and overdominant. Several QTLs affecting different fiber-related
traits were detected within the same chromosome region, suggesting that genes controlling fiber traits may be linked or the
result of pleiotropy. 相似文献
11.
崇化大梨×新世纪梨F1代分子遗传图谱的构建及两个果实性状的QTL分析 总被引：1，自引：0，他引：1
利用崇化大梨×新世纪梨杂交得到的94株F1代实生苗为作图群体,应用mapmaker/exp 3.0软件构建了一张包括19个SSR标记,315个SRAP标记,合计335个标记分属于18个连锁群的遗传图谱,图谱总长度为1 300 cM,平均图距为3.9 cM。采用区间作图法检测到与果实发育期、果形指数两个果实性状相连锁的QTL位点7个,其中主效的QTL位点2个(LOD≥3.5),分别位于LG2和LG17连锁群。 相似文献
12.
QTL analysis of resistance to Fusarium head blight in wheat using a 'Wangshuibai'-derived population 总被引：9，自引：1，他引：9
M. Mardi H. Buerstmayr B. Ghareyazie M. Lemmens S. A. Mohammadi R. Nolz P. Ruckenbauer 《Plant Breeding》2005,124(4):329-333
Fusarium head blight (FHB) is a devastating disease that reduces the yield, quality and economic value of wheat. For quantitative trait loci (QTL) analysis of resistance to FHB, F3 plants and F3:5 lines, derived from a ‘Wangshuibai’ (resistant)/‘Seri82’(susceptible) cross, were spray inoculated during 2001 and 2002, respectively. Artificial inoculation was carried out under field conditions. Of 420 markers, 258 amplified fragment length polymorphism and 39 simple sequence repeat (SSR) markers were mapped and yielded 44 linkage groups covering a total genetic distance of 2554 cM. QTL analysis was based on the constructed linkage map and area under the disease progress curve. The analyses revealed a QTL in the map interval Xgwm533‐Xs18/m12 on chromosome 3BS accounting for up to 17% of the phenotypic variation. In addition, a QTL was detected in the map interval Xgwm539‐Xs15/m24 on chromosome 2DL explaining up to 11% of the phenotypic variation. The QTL alleles originated from ‘Wangshuibai’ and were tagged with SSR markers. Using these SSR markers would facilitate marker‐assisted selection to improve FHB resistance in wheat. 相似文献
13.
An SSR-based molecular genetic map of cassava 总被引：7，自引：2，他引：7
Summary Microsatellites or simple sequence repeats (SSR) are the markers of choice for molecular genetic mapping and marker-assisted
selection in many crop species. A microsatellite-based linkage map of cassava was drawn using SSR markers and a F2 population consisting of 268 individuals. The F2 population was derived from selfing the genotype K150, an early yielding genotype from an F1 progeny from a cross between two non-inbred elite cassava varieties, TMS 30572 and CM 2177-2 from IITA and CIAT respectively.
A set of 472 SSR markers, previously developed from cassava genomic and cDNA libraries, were screened for polymorphism in
K150 and its parents TMS 30572 and CM 2177-2. One hundred and twenty two polymorphic SSR markers were identified and utilized
for linkage analysis. The map has 100 markers spanning 1236.7 cM, distributed on 22 linkage groups with an average marker
distance of 17.92 cM. Marker density across the genome was uniform. This is the first SSR based linkage map of cassava and
represents an important step towards quantitative trait loci mapping and genetic analysis of complex traits in M. esculenta species in national research program and other institutes with minimal laboratory facilities. SSR markers reduce the time
and cost of mapping quantitative trait loci (QTL) controlling traits of agronomic interest, and are of potential use for marker-assisted
selection (MAS). 相似文献
14.
15.
T. Sugimoto K. Tamaki J. Matsumoto Y. Yamamoto K. Shiwaku K. Watanabe 《Plant Breeding》2005,124(5):498-501
To identify markers for the everbearing gene in strawberries, 199 F1 progeny plants were produced from a cross between ‘Ever Berry’ (a Japanese everbearing strawberry) and ‘Toyonoka’ (a Japanese Junebearing strawberry) as the experimental population. The results of flowering tests produced 97 everbears and 102 Junebears. The chi‐square test gave a goodness of fit for the expected ratio of 1 : 1 for everbears to Junebears, suggesting the inheritance of the everbearing trait is controlled by a monogenic dominant gene. RAPD analyses on this trait were carried out using ‘Ever Berry’ and ‘Toyonoka’. Seventy‐one primers, which produced 89 polymorphic fragments between the two parents, were identified from a total of 175 primers. Five markers relating to the everbearing trait were selected from 26 of the 199 progeny plants. The remaining 173 seedlings were analysed with these five markers and a linkage map was constructed using all of the 199 F1 progeny plants. The length of this linkage group is 39.7 cM. The closest markers found, OPE07‐1 and OPB05‐1, are respectively mapped at 11.8 and 15.8 cM on each side of the everbearing gene. 相似文献
16.
Genetic mapping of quantitative trait loci for fiber quality and yield trait by RIL approach in Upland cotton 总被引：21，自引：1，他引：21
Xinlian Shen Wangzhen Guo Qiongxian Lu Xiefei Zhu Youlu Yuan Tianzhen Zhang 《Euphytica》2007,155(3):371-380
The improvement of cotton fiber quality has become more important because of changes in spinning technology. Stable quantitative
trait loci (QTLs) for fiber quality will enable molecular marker-assisted selection to improve fiber quality of future cotton
cultivars. A simple sequence repeat (SSR) genetic linkage map consisting of 156 loci covering 1,024.4 cM was constructed using
a series of recombinant inbred lines (RIL) developed from an F2 population of an Upland cotton (Gossypium hirsutum L.) cross 7235 × TM-1. Phenotypic data were collected at Nanjing and Guanyun County in 2002 and 2003 for 5 fiber quality
and 6 yield traits. We found 25 major QTLs (LOD ≥ 3.0) and 28 putative QTLs (2.0 < LOD < 3.0) for fiber quality and yield
components in two or four environments independently. Among the 25 QTLs with LOD ≥ 3, we found 4 QTLs with large effects on
fiber quality and 7 QTLs with large effects on yield components. The most important chromosome D8 in the present study was
densely populated with markers and QTLs, in which 36 SSR loci within a chromosomal region of 72.7 cM and 9 QTLs for 8 traits
were detected. 相似文献
17.
Genetic study on important traits of tea is difficult because of its self-incompatibility in nature. Moreover, development of a new variety usually needs more than 20 years, since it takes many years from seedling to matured plants for trait investigation. Genetic map is an essential tool for genetic study and breeding. In this study, we have developed an integrated genetic map of tea (Camellia sinensis) using a segregating F1 population derived from a cross between two commercial cultivars (‘TTES 19’ and ‘TTES 8’). A total of 574 polymorphic markers (including SSR, CAPS, STS, AFLP, ISSR and RAPD), 69 markers with highly significant levels of segregation distortion (P < 0.001) (12.0 %) were excluded from further analyses. Of the 505 mapped markers, there were 265 paternal markers (52.5 %), 163 maternal markers (32.3 %), 65 doubly heterozygous dominant markers (12.9 %), and 12 co-dominant markers (2.4 %). The co-dominant markers and doubly heterozygous dominant markers were used as bridge loci for the integration of the paternal and maternal maps. The integrated map comprised 367 linked markers, including 36 SSR, 3 CAPS, 1 STS, 250 AFLP, 13 ISSR and 64 RAPD that were assigned to 18 linkage groups. The linkage groups represented a total map length of 4482.9 cM with a map density of 12.2 cM. This genetic map has the highest genetic coverage so far, which could be applied to comparative mapping, QTL mapping and marker assisted selection in the future. 相似文献
18.
研究目的在于为以后控制重要农艺性状的QTL定位、梨分子标记辅助育种及品种改良提供基础理论。利用‘新世纪梨’ב崇化大梨’杂交得到的210 株F1代实生苗为作图群体,对分离群体进行了ISSR、SRAP、SSR 标记的多态性检测,共得到154 条多态性条带,其中偏离孟德尔遗传比例的含21.4%(P＜0.01)。应用JoinMap 4.0 软件对154 个多态性条带进行遗传连锁分析,构建了一张包括9 个SSR标记,79个SRAP标记,8个ISSR标记,合计96个标记分属于14个连锁群的遗传图谱,图谱总长度为1530 cM,平均图距为16.1 cM,最大的连锁群含有64个标记,最小遗传距离小于0.1 cM。 相似文献
19.
Justyna Guzy-Wróbelska Anna Labocha-Pawlowska Miroslaw Kwasniewski Iwona Szarejko 《Euphytica》2007,156(1-2):173-183
This study compared the meiotic recombination frequency between wheat doubled haploid (DH) populations obtained through two
different methods, maize pollination (MP♀) and anther culture (AC♂). The comparison was based on a genetic linkage analysis,
performed with DNA markers. Thirty-five polymorphic markers (15 SSR, 15 AFLP, 5 RAPD) were screened in MP♀ and AC♂ doubled
haploids populations, derived from the same hybrid genotype (F1 of ‘Eta’ × ‘Darkhan 15’). Nine linkage groups, comprising 35 loci (the MP♀ lines) and 31 loci (the AC♂ lines), were constructed.
The linkage groups in both DH populations showed identical orders of markers, except for one group mapping to chromosome 6B.
The MP♀ and AC♂ linkage maps differed significantly in recombination frequencies for corresponding intervals. In total, the
AC♂ linkage map (495.5 cM) was 40.5% longer than the MP♀ map (352.8 cM), indicating a significantly higher meiotic recombination
rate in pollen mother cells. The enhancement in recombination was visible in five of nine linkage groups, and in 7 intervals
between individual loci out of 19 compared. Moreover, for 6 other intervals a lack of linkage was observed in the AC♂ population,
as compared to the MP♀ map. 相似文献
20.
Qun Wan Zhengsheng Zhang Meichun Hu Li Chen Dajun Liu Xiao Chen Wei Wang Jing Zheng 《Euphytica》2007,158(1-2):241-247
A genetic linkage map of chromosome 6 was constructed by using 270 recombinant inbred lines originated from an upland cotton
cross (Yumian 1 × T586) F2 population. The genetic map included one morphological (T1) and 18 SSR loci, covering 96.2 cM with an average distance of 5.34 cM between two markers. Based on composite interval mapping
(CIM), QTL(s) affecting lint percentage, fiber length, fiber length uniformity, fiber strength and spiny bollworm resistance
(Earias spp.) were identified in the t1 locus region on chromosome 6. The allele(s) originating from T586 of QTLs controlling lint percentage increased the trait
phenotypic value while the alleles originating from Yumian 1 of QTLs affecting fiber length, fiber length uniformity, fiber
strength and spiny bollworm resistance increased the trait phenotypic value. 相似文献